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From "Dmitry Lysnichenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-3703) ConcurrentModificationException in Ambari Server log
Date Wed, 06 Nov 2013 14:15:18 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-3703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13814910#comment-13814910
] 

Dmitry Lysnichenko commented on AMBARI-3703:
--------------------------------------------

+1

> ConcurrentModificationException in Ambari Server log
> ----------------------------------------------------
>
>                 Key: AMBARI-3703
>                 URL: https://issues.apache.org/jira/browse/AMBARI-3703
>             Project: Ambari
>          Issue Type: Task
>          Components: controller, test
>    Affects Versions: 1.4.1
>            Reporter: Oleksandr Diachenko
>            Assignee: Oleksandr Diachenko
>             Fix For: 1.4.2
>
>         Attachments: AMBARI-3703.patch
>
>
> This is an unlikely repro. However, we can go through the code to see if we can find
out possible cause.
> {code}
> 01:56:26,714  WARN [Thread-2] HeartbeatMonitor:98 - Exception received
> java.util.ConcurrentModificationException
>         at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
>         at java.util.AbstractList$Itr.next(AbstractList.java:343)
>         at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
>         at org.apache.ambari.server.agent.HeartbeatMonitor.generateStatusCommands(HeartbeatMonitor.java:185)
>         at org.apache.ambari.server.agent.HeartbeatMonitor.doWork(HeartbeatMonitor.java:164)
>         at org.apache.ambari.server.agent.HeartbeatMonitor.run(HeartbeatMonitor.java:90)
>         at java.lang.Thread.run(Thread.java:662)
> {code}



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